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Interactive rolling hypocycloids

Author:
Malin Christersson
Topic:
Parametric Curves
An interactive version of the rolling hypocycloids described by John Baez (and others) at: http://johncarlosbaez.wordpress.com/2013/12/03/rolling-hypocycloids/ Javascript and GeoGebra versions at: http://www.malinc.se/m/RollingHypocycloids.php In order to fit inside each other, each hypocycloid rotates around a point that lies on the periphery of a circle whose midpoint is the centre of the next (larger) hypocycloid.
Move the white dot!

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